Can I upload / share my Blender animations?
The copyright on artwork created with Blender is owned by the creator of the artwork.  Nothing in the Blender license agreement infringes on the moral rights of the artist.

This means you are free to publish, distribute, licence, exhibit or otherwise diseminate your art as you see fit.

See the Your Artwork section of Blender license page:


  All your artwork – images or movie files – including the .blend files
  and other data files Blender can write, is free for you to use as you
  like.
  
  That means that Blender can be used commercially by artists, by
  studios to make animation films or vfx, by game artists to work on
  commercial games, by scientists for research, and by students in
  educational institutions.